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Images after second irradiation for a) 2% b) 4% and c) 5% concentration of monomer Acoustic Images Upon irradiation, different polymer structures are created in the gel.
The size of the polymer structures differs with dose.
The absorption is strongly dependent on tissue composition and structure.
Since the absorption is strongly dependant on tissue composition and structure, therefore the absorption is decreasing due to polymerization process.
Radiation Chemistry : An Introduction.

The addition of alkali or alkaline earth modifiers to pure TeO2 glass system will cause a change of Te coordination polyhedron yet incorporation of second oxide component is needed to ensure the stable structure of the glass [10].
This is due to the weakening of the atomic bonding when Er3+ ions are introduced into the structure thus the networking becomes unstable.
Revel, in: Structure and properties of ZnO-B2O3-P2O5-TeO2 glasses, Materials Chemistry and Physics, 124 (2010), 732-737
Xiujian, in: Structure, upconversion and fluorescence properties of Er3+-doped TeO2-TiO2-La2O3 tellurite glass, Journal of Rare Earths, 25 (2007) p. 108 [9] El-Mallawany R, in: J.
Naji M, in: Glasses formation, characterization, and crystal-structure determination in the Bi2O3-Sb2O3-TeO2 system prepared in an air, J Mater Sci, 46 (2011), 5439-5446

The drawing of liquid into a pore structure of average pore diameter d requires an external pressure P on the liquid described by the Washburn Equation d coslv4 P θγ −= (2) A threshold pressure P* for spontaneous infiltration into particulate media is given as [8,9]: ( ) D)1( coslv6 *P ∆− ∆θγ−λ = (3) where D is the particle size, ∆ is the relative density and λ is the ratio of the particle actual surface area to the surface area of a sphere of the same volume.
The sacrificial structure was eventually designed into preform parts directly to create a self-supporting structure and to provide ease of infiltration.
[3] Handbook of Chemistry and Physics 72nd ed., CRC Press, 1991 4.136
Wulff, "The Structure and Properties of Materials: Volume II - Thermodynamics of Structure", John Wiley and Sons, New York, 1964,, 49-52

Meanwhile, XRD measurement were taken for iron foils and prepared samples.Fig3(a) shows 2 peaks, which are cubic structure indexed to lattice parameters a=2.8608 Å, b=2.8608Å, c=2.8608 Å.
Fig.3(b) are indexed to an α-Fe2O3 rhombohedral structure with lattice parameters a=5.0310 Å and c=13.7370Å.
We also systematically studied the different settings, the annealing temperature and reaction time on the nanowires morphology and structure.
Kung, Transition Metal Oxides: Surface Chemistry and Catalysis(Elsevier, New York, 1989)
Schwertmann, The Iron Oxides, Structure, Properties, Reactions, Occurence and Uses, VCH, Weinhein, (1996)

Preparation of Al-MCM-48 and Ti-MCM-48 Zhixi Zhaoa, Liming Zhangb, Ping Chenc Key Laboratory of Pollution Monitoring and Control, College of Chemistry and Chemical Engineering, Xinjiang Normal University, Urumqi 830054, China azhixizhao@qq.com,beric_xjnu@163.com,chappyxjway@163.com Keywords: phase transition; Al-MCM-48; Ti-MCM-48 Abstract.
As to MCM-50, there is no pore structure in its unstable lamellar phase [11].
The disappearance of (420) and (322) peaks indicate the degradation of the cubic symmetry pore structure in the synthesized samples.
The product with cubic structure present in the narrow range of the alkalinity of synthesis gel.
Presence of organic additives as structure modifiers in synthesis gel may influence the above mechanism of phase transition.

The phase structure, surface morphology, photoluminescence characteristics are studied .
The target phosphor has orthorhombic crystal structure with space group Pmma and cell parameters of a=24.785Å, b=8.487Å and c=4.886Å.
The result suggests that the doped Eu2+, Dy2+ ions have little influence on the crystalline structure of phosphors due to the similar ionic radii of Eu2+(0.112nm), Dy2+(0.107nm) and Sr2+ (0.114nm)[19-21].
These rods form porosity structure, due to the escaping of gaseous products during the calcination process.
Chen: Chemistry and Physics, Vol. 65 (2000) No.2, p.103

On the seventh day of ripening, structure formation took place.
The structure of the prepared films was defined by atomic force microscopy (Fig. 4).
Introduction of silicon into the material structure resulted in higher bioactivity of the respective implants.
Calcium phosphate cements for bone substitution: Chemistry, handling and mechanical properties.
Sakka, Solutions able to reproduce in vivo surface – structure changes in bioactive glass – ceramic.

In this paper, the hollow metal spheres were introduced into the Ru-based catalytic system of selective hydrogenation of benzene to cyclohexene [11], and the metal Ru catalyst was designed as a hollow Ru sphere catalyst to improve the atomic utilization rate and study its forming structure.
Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) were used to characterize the structure, morphology and composition of the modified and corroded Ru hollow spheres.
The structure, morphology and composition of modified and corroded Ru hollow spheres were characterized by SEM, TEM and XRD.
This indicates that after hydrofluoric acid corroded SiO2 microspheres, the metal Ru shell coating on the surface of SiO2 microspheres collapses and contracts, forming a hollow sphere structure.
Controlled Synthesis of Ultrathin Hollow Mesoporous Carbon Nanospheres for Supercapacitor Applications.Industrial & Engineering Chemistry Research,53(8)3125-3130, 2014

The ionic specimens with active principle presents in the structure glass is gradually set free during long time, providing a long time of the bactericide action for the products [6].
A method to develop biocide properties in these materials consists to incorporate the metallic ions capable to eliminate bacteria (bactericide elements) and/or fungi (fungicide elements) into the glass structure.
Many works report the use of ionic exchange processes incorporating Ag + and Cu ++ into glass structure [8].
EDS techniques was used to evaluate silver incorporation in the glass structure.
Greaves: Journal Physical Chemistry Vol. 97 (37) (1993), p. 9330

There is a certain relationship between the sludge cake structure and the dewatering performance [12-14].
Therefore, it is necessary to observe the microstructure of the sludge cake, to analyse the relationship between mud cake structure and the dehydration characteristic [15,16].
After adding organic polymer flocculant, the surface structure of sludge cake has improved.
Therefore, curing agent E and F play a key role in the sludge structure.
At the same time, the SEM image shows the minimum density of the sludge structure.